1. Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan,
2. Department of Earth and Environmental Science, University of Pennsylvania, 251 Hayden Hall, 240 South 33rd Street, Philadelphia, Pennsylvania 19104, U.S.A.,
3. Ohio Center for Ecology and Evolutionary Studies and Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, 228 Irvine Hall, Athens, Ohio 45701, U.S.A.,
4. School of International Liberal Studies, Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo 169–8050, Japan,
5. Institute of Paleontology and Geology, Mongolian Academy of Sciences, Sambuu Street, Chingeltei Distric-4, Ulaanbaatar 14201, Mongolia,